メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.429799982311 43.8146452832108, 142.429789165339 43.8146543848458, 142.42561795904 43.8120328125131, 142.427878031024 43.8101187644942, 142.428929565752 43.8107861550125, 142.429454371038 43.8111177732956, 142.432065164665 43.8127188770288, 142.431741033726 43.813013470088, 142.431526440479 43.8132085262244, 142.43112364721 43.8135437463122, 142.429799982311 43.8146452832108)) ^^http://www.opengis.net/ont/geosparql#wktLiteral